60 Mr. R. V. Chamberlin on new 
Castanotherium obscurum, sp. n. 
This species seems much to resemble C. carinatum, Poc., 
described from Mt. Kina Balu in Northern Borneo, but seem- 
ing to differ in the copulatory organs, structure of the second 
tergite, etc., and in the larger size and different coloration. 
The colour is dark brown to fuscous, with the keels 
testaceous, the light colour extending less than halfway to 
the mid-dorsum. Anal tergite bordered entirely across 
with the same light colour. Antenne, legs, and ventral 
surface, in general, fulvous. 
The head densely deeply punctate, the puncte setigerous ; 
concave above at the middle. eee 
The collum has the anterior face subvertical, the lower 
edge at middle curviug ventrad to fit the concavity of the 
head. Finely transversely ridged across anterior border of 
the dorsal surface, depressed caudad of the ridge, with the 
surface densely deeply punctate. 
The second tergite with anterior margin elevated, a strong 
transverse ridge caudad of the anterior border, but much 
farther* forward than in carinatum, and a second obscure 
ridge a little further caudad ; surface deeply punctate. All 
following plates punctate, sulcate, or striate; scabrous in 
front ; caudal margin with a dense fringe of caudally directed 
short hairs. 
Anal scutum closely punctate; in front finely granular 
and scabrous. 
Legs with a single spine above tlie claw. 
In the posterior gonopods the two fiugers are equal in 
Jength. The proximal part of the movable finger is notably 
thicker than represented by Pocock for carinata. In the 
anterior gonopods the immovable finger, in comparison with 
the other, is much shorter and more abruptly bent distally 
toward the latter. 
In the vulva of the female the distal piece is longer disto- 
proximaliy than in carinatum, and the piece as a whole 
proportionately larger as weil as being diffi rently shaped. 
Length of male about 32 mm. ; width 15 mm., as against 
11°5 mm. in carinatum. 
Locality —Borueo: Sarawak, Ladong (H. W. Smith). 
Type, Mus. Comp. Zool. (No. 4688); paratypes (No. 
4.689). 
Castanotherium leium, sp. 0. 
Dull brown above, the keels ferrugiious except marginally. 
